We have a winner (Brew again...)
The First line is a shout out to him apparently being the only person who isn't a standard guard living in the Guardhouse in Morthal
The Second line is a reference to the Hero Morihaus (or however you spell it) a hero who the town is supposedly named after. He was the first named person to wear the Lord's Mail.
And the final line was a very cryptic reference to Morthal itself.